Yes, but this feature deletes from server from administrator page only. when I delete file from web site (not admin) it stays on the server, but phoca do not show it (in admin or in web). and if feature overwrite is disabled, when you upload file with same name it says: "File not uploaded File already exists". That's how I found it.
Edited:
Just found one interesting thing: when You upload file from administrator page, phoca uploads files here: [web_site]/phocadownload/
But if You upload from web page, phoca creates 10 random symbol folder for each user and path is like this: [web_site]/phocadownload/userupload/[10rand_symb].
maybe this is the problem why it won't delete this file?
Edited No. 2:
If I delete 10 random symbol folder from server and upload file again, it creates same 10 symbol folder
